Casing head



Sept. 20, 1927.

L. M. PEARCE ET AL CASING HEAD Filed Dec. 18, 1924 lu u V INVENTOR/ m jzlifu 0 l/M j AT TjR NEy j,

Patented Sept. 20, 1927.

. STATES LOUIS M. PEARCE AND JAMES O.

McPIIERSON, or HOUSTON, TEXAS.

VCASIN'G HEAD.

Application filed December a This invention relates to new and useful imgrovements in a casing head.

ne object of the invention is to rovide a casing head designed to be attache to the upper end of a well casing and adapted to close the casing so as to prevent the escape, and Waste, of oil flowing from the Well. The type of easing head herein described has been specially designed to be used in connection with oil wells and forms'a support for the pump therein, and also forms a closure for the upper end of the well casing to confine the oil to its proper outlets arid to prevent the escape and waste of said 01 With the above and other objects in view this invention has particular, relation to certain novel features of construction, operation and arrangements of parts, an example of which is given in this specification, and

illustrated in the accompanying drawings, wherein v Figure 1 shows a vertical sectional view of the device, and Figure 2 shows a plan view thereof.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 designates the well 3o casing to the upper end of which the casing head bowl 2 is attached. a This bowl has the lateral outlets ;3, 3 and its 11 per end is formed with an upwardly flare seat 4 and an annular outwardly extending rim 5.

The numeral 6 designates .a tubular connecting nipple whose up er end is enlarged forming the upwardly forming in contour to, and adapted to seat in, the seat4. A seal, of lead or other soft metal, as 8 surroun'ds said head and forms a fluid tight joint between the bowl 2 and head 7. The pump tubing 9 is connected to the lower end of the nipple 6 "and extends 'down into the well and supports the pump (not shown) therein, Leading from the upper end of the nipplethere is the oil discharge line 10 through which the, pumped oil is discharged. 7

A retaining plate of the head 7 and is bolted to the rim 5 by means of the bolts 12. v

- Ordinarily the oil will be -umpedthrou h the line 10, but should t e well start i owing, and the volume of oil become ared ,head 7, con- 7 11 is fitted arpund the $0 discharge line 10 and rests on the upper end 18, 1924. Serial No. 756,837.

too great for the pump to handle it will be forced up through the casing and out through the outlets 3, 3, but the seal 8 will prevent the escape of oil-out through the casing head and its consequent waste, and the retaining plate 11, being bolted to the casing head bowl will prevent the head 7 from being lifted from its seat by pressure within the casing. I

It often happens that an oil well catches afire. In such case the seal 8 will melt, but the head 7 is flared sufliciently to prevent its passage through the bowl 2 of the casing head so that, in event of fire, the pump tubing will, in all events, he sustained by the bovlsil so that the pump cannot drop into the we In case the fire becomes hot enough to melt the bowl 2, as sometimes happens, the head 7 will hang on the to of the casing 1 and prevent the pump tu ing from dropping into the well. In case of storm should the derrick become blown away," as sometimes happens, carrying the discharge line 10 with it, the nipple 6 being of thick strong material and being firmly secured to the casing head bowl will serve as a secure anchorage for the well tublng beneath and will prevent the same from becoming bent or from dropping in the well.

What we claim is 1. A casing head including a bowl adapted to be secured to the upper end of a well casing and having an upwardly'flared seat, a tubular member therein having a' flared head formed with a surrounding sleeve and adapted to rest on sald seat. said head having a greater transverse diameter than the diameter of the casin ,the' lower and of said member exten in down soft metal through and being spaced from t e bowl thebowl; down into the casing" and being. spaced from the bowl and easing and'having 5' walls thickerv than the pipe, a retainer abuts, s n he pe and f said member between said flared head and said seat.

3. A casing head adapted to be secured 'to the upper endof a well casing and including a bowl having a lateral outlet and an upwardly flared seat, a flared head adapted to rest on said seat, the lower end of said head having a tubular extension adapted to extend down through said bowl and into said casing and being reduced to form a tubing connection and having thickened walls, a retaining member secured to the bowl and abutting against the upper end of the head and a sleeve of soft metal Iliorriing a seal between said seat and flared 4 A casing head adapted to be secured to the upper end of a well casing including a bowl, a closure seated in the bowl and having a larger diameter than the casing, atubular reduced extension depending from said closure through said bowl and adapted to extend on down into the casing 'andforming a tubing connection whose walls are thicker than the walls of the tubing, means retaining the closure in place and a sleev e forming a seal between said bowl and 010- sure.

I In testimony whereof we have signed our names to this specification.

LOUIS M. PEARCE.- JAMES o. MoPHERSON. 

